📝 Task

Goal: Manually send an Ethernet packet with EtherType = 0xFFFF to the remote host 10.0.0.2.

🖥️ Environment

ip a

Output:

3: eth0@if4: <BROADCAST,MULTICAST,UP,LOWER_UP> ...
    link/ether 7a:85:31:e7:b3:81 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.1/24 ...

Your Ethernet (MAC) address is: 7a:85:31:e7:b3:81

Step 1: Identify Destination MAC Address

>>> arping("10.0.0.2")

Result:

Received 1 packets
src                psrc
12:03:30:2f:d8:4e  10.0.0.2

Step 2: Craft the Ethernet Packet

>>> pkt = Ether(src="7a:85:31:e7:b3:81", dst="12:03:30:2f:d8:4e", type=0xFFFF)

Step 3: Send the Packet

>>> sendp(pkt, iface="eth0")

Output:

Sent 1 packets.

Flag

pwn.college{YZChcjgmSIXVrWICQ_zO2t7erdq.QX2YzMzwSM0IzMyEzW}